Vibratory conveyer and screen



y 1942- c. J. JOHNSON 2,290,434

VIBRATORY (JONVEYER AND SCREEN Filed Ma 9, 1939 2 sheets-sheet;

[v VE/VTOR .CLAUS J. JOHNSON,

y 1942- C.,J. JOHNSON 2,290,434

VIBRA'I'ORY CONVEYER AND SCREEN Filed May 9, 1939 2 Sheets-Sheet 2 f/VVENTOR. YCLAUS J. JOHNSON,

BY 0 m. M

Patented July 21, 1942 2,290,434 VIBRATORY coNvEyEa AND SCREEN Claus J. Johnson, Columbus, Ohio, asslgnor to The Traylor-Vibrator Company, a corporation of (Jolorado Application May 9,1939, Serial No. 272,650

a A 7 Claims.

This invention relates to an improved vibratory conveyor and screen, and an object of the invention is to provide a high capacity machine of the above mentioned type.

Another object of the invention is to provide an improved type of screen or grizzly particularly adapted to be used in a vibratory apparatus.

A further object of the invention is to provide a device of the above mentioned type in which a grizzly or screen extends over a large area and a plurality of vibratory motors is provided, some of which are spaced laterally of the screen and some rearwardly thereof.

- Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claims.'

In the accompanying drawings,

Fig. l is a side elevational view of an installation including the improvements of my invention;

Fig. 2 is a plan view of the vibratory conveyer and screen ofFig; 1; and

Fig. 3 is an end view of the deck of the vibraory conveyer andscreen.

Referring to the accompanying drawings, it will be seen that the vibratory screen and conveyer comprises a deck Ill, formed of a pair of It is desired to form a rather extensive screerr'" preferably in the form of a grating or grizzly I! which extends from the relatively short bottom 15. forwardly throughout substantially the rest of the length of the deck l so that material to be screened and conveyed by the deck I0 is treated while moving over a substantial area. The screen, grating or grizzly I1 is preferably formed by a plurality of separably or individually removable grizzly sections, as clearly illustrated in Figs. 1 and 3 of the drawings, each of which sections comprises a pair of upstanding T-shaped grizzly bars IS, the top webs of which progressively decrease in width from the rear end of the screen, grating or grizzly H to the front end thereof, as clearly illustrated in Fig. 2 of the drawings. This, of course, makes for a progressive screenin of the material as it tra els over said screen, grating or grizzly H.

The vertical webs of each pair of bars IB are rigidly attached, as by welding, to three angle members I9, 20 and 2| which are bolted to the aforementioned cross-members I2, I 3 and, re-

spectively.

It will thus be seen that the complete screen, grating or grizzly I1. is formed by a plurality of individual sections each including a pair of bars I8, and attached angle members I9, 20 and ill. This provides for the ready removal and replacement of a portion of the complete screen, grat= ing or grizzly in case anypart of it becomes worn or damaged.

Due to the size of the complete vibratory conveyer and screen it is desirable to vibrate it with a plurality of electro-magnetic motors, and I have provided a particular'arrangement of these motors which permits of free passage of the material through the screen, grating or grizzly I 1 while affording a proper balance of the parts and affording adequatepower to operate the device.

22 to which is attached the vibratory armature shaft 23 of a vibratory electro-magnetic motor 24, the general plane of which is upright or vertical, as clearly seen by reference to Figs. 1 and 2 of the drawings, which electro-magnetic motor 24 is preferably of the structure disclosed in detail in the patent to James A. Flint, No. 2,153,243, dated April 4, 1939, for a Vibratory screen.

Each of the electro-magnetic motors 24 is supported from a superstructure 25 by a shock proof support 26 preferably having the structure similar to the support seen in the above mentioned patent to James A. Flint.

At its rear end and in part below the bottom 15 I provide two additional electro-magnetic motors 21 which have substantially the same construction as the motors 24, said motors 21 being attached to the deck It) by brackets 30, 30 assoto James A. Flint also shows in detail the structure of the vibratory motors 24 and 21.

As illustrated in Fig. 1 of the drawings, a hopper chute 32 is provided to guide and direct material to the vibratory conveyer and screen, and a bin 33 is positioned below the screen, grating or gizzly I! to receive the material which passes therethrough. It is, of course, evident that by To this end each of the side walls In is provided with an outwardly extending bracket virtue of the lateral positioning of the motors 24 the material passing through the screen, grizzly or grating I1 is received freely by the bin 33.

In the operation of the device the material to be conveyed and classified according to size is directed by.the chute 32 onto the deck l0. Vibratory motion having vertical and horizontal components imparted to the deck I!) by the motors 24 and 21 will effect a positive conveying action on said material to convey it toward the discharge or the right hand end of the deck l0. As the material passes over the screen, grating or grizzly I! it will be classified according to size with those particles of suiiiciently small size passing therethrough and into' the bin 33, the larger particles being discharged over the right hand end of the screen, grating or grizzly I! where they may be received by any desired receptacle, such as a bin, conveyer, or the like.

It may be noted that in the drawings the deck I is shown sloping downwardly at an angle of ten degrees. Such a downward slop, of course, increases the capacity of the vibratory conveyer and screen. However, this downward sloping is not necessary and the deck l0 may be horizontal or, in fact, it may even incline upwardly if circumstances make either condition desirable or necessary. f

It is evident that I have provided a combined vibratory conveyer and screen of large capacity with a very extensive screening area to effect a very efficient separation of material according to size. Furthermore, a very rugged and flexible grating or grizzly has been provided which is made up of separable bar sectionswhich can be individually removed and replaced.

I have described and claimed the individually removable bar sections in my co-pending divisional application, S. N. 391,775, filedMay 3, 1941, for an improvement in Vibratory conveyer .and screen.

' combination with a deck having a screening bottom area, of vibratory motor means for vibrating .said area with a motion having -a rectilinear movement which makes-an acute angle to the general plane of said bottom area, said motor means including vibratory motors spaced laterally of said deck and motor means spaced rearwardly thereof.

2. In avibratory feeder and screen, the combination with a deck having an imperforate bottom pan adjacent one portion and a perforate screening area adjacent thereto, of means to vibrate said deck, said means including vibratory electro-magnetic motor means positioned below said imperforate bottom pan and an electro-magnetic motor adjacent each side of said deck spaced laterally of said screening area.

3. In a vibratory feeder and screen, the combination with a deck having an imperforate bottom pan adjacent one portion and a perforate screening area adjacent thereto, of means to vibrate said deck, said means including vibratory motor means positioned below said imperforate bottom pan and a motor adjacent each side of said deck spaced laterally of said screening area.

4. A combined feeder and grizzly comprising a pan having a rear imperforate bottom, an elongated grizzly ahead of said imperforate bottom, means for vibrating said deck comprising a motor below said imperforate bottom, and a motor spaced laterally of said grizzly at each side of said pin.

5. A combined feeder and grizzly comprising i a pan having a rear imperforate bottom, a grizzly ahead of said imperforate bottom, means for vibrating said deck comprising a motor below said imperforate bottom, and a motor spaced laterally of said grizzly at each side of said pan.

6. In a vibratory screen, the combination with a deck having a screening surface permitting material to pass therethrough, of vibratory motor, means for vibrating said deck, including at least three vibratory motors, at least one at each side of said-deck and spaced laterally thereof to provide for free and unobstructed passage of material through and below said screen, and at least one at an end of said screen spaced out of the path of such material, eachof said motors including one or more elongated fiat spring bars, the end motor being so attached to said screen that its flat spring bars extend in a direction transversely of said deck and the motors at the sides of said deck being so attached to said screen that their flat spring bars extend upwardly with respect to said screening surface.

7. In a vibratory screen, the combination with a deck having a screening surface permitting material to pass therethrough, of vibratory motor means for vibrating said deck, including at least three vibratory motors, at least one at each side of said deck and spaced laterally thereof to provide for free and unobstructed passage of material through and below said screen, and at least one at an end-of said screen spaced out of'the path 'of such material, each of said motors ineluding one or more elongated fiat spring bars, the motors at the sides of said deck beingso atatachd to said screen that their flat spring bars extend upwardly with respect to said screening surface.

CLAUS J. JOHNSON. 

